Paper-bag machine.



No. 71,266. Patented Apr. 2, I91. 6. P. DAVIS.

PAPER BAG MACHINE.

(Application filed Aug. 5, 1899.) (No Model.)

6 Sheets-Sheatj.

WITNESSES Attorneys.

No. 67!,266. Patented Apr. 2 IBM. 6. P. DAVIS.

PAPER BAG MACHINE.

(Application filed Aug. 5, 1899.)

(No Model.) 6 Sheets-Sheet 2.

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G.- P. DAVIS.

PAPER BAG MACHIN E. v

Patented Apr. 2 I91".

.6 Sheets-Sheet}.

' WITNESSES INVENTOR Attbrnays.

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No. 67l,.266.

G. P. DAVIS. PAPER BAG MACHINE.

(Application filed Aug. 5, 1899.;

Pa'tentad Apr. 2,190].-

6 Sheets-Sheet 4 (No final.)

I/I/IDTNESSES 525;. 5. W

INVEN TOR flay-4 7 462;

Attorneys.

No. 67|,266. Patented Apr. 2, l90l.

G. P. DAVIS.

PAPER BAG MACHINE.

(Application filed Aug. 5, 1899.} (No Model.) 1 .6 Shaets-$haet 5.

in: Nor-nus FETERS co. muicmmm wAsmusroNp. r.

u 6 7l,266. Patented Apr; 2, HM.

G. P. DAVIS. PAPERBAG MACHINE.

(Application filed Aug. 5 1899.) (No Model.)

'6 Sheets$heet 6.

/6 1 I 0 U H l I E 6 M .6 WIT 5555s .22. INVENTOR fimxew Attorneys. I

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lJNiTED STATES GEORGE P. DAVIS, OF DETROIT, MICHIGAN, ASSIGNOR TO THECONTINENTAL PAPER PACKAGE 00., OF SAME PLACE.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 671,266, dated April 2,1901.

Application filed gu 1 1899- To all whom it 77260;] concern:

Be it known that I, GEORGE P. DAVIS, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Paper-Bag Machines; and I declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

This invention relates to paper folding machines, and has for its objectan improvement in paper-folding machines of the class adapted to foldpaper bags known as cornucopias. The bag folded by this machine is madefrom a rectangular, square, or nearly square piece of paper foldeddiagonally, with the diagonal fold running parallel to and slightly atone side of the diagonal of the paper. Such a fold brings the end edgeof the paper over parallel to a side edge of the paper, and the sideedge of the paper is folded back over the end edge and pasted down ontoit. The bag now has the shape of a right-angled triangle, of which thefolded edge forms the hypotenuse, one of the right sides formsthe openend and the other right side the pasted end. A small part of theinturned edge projects beyond the hypotenuse at the point, and in orderto perfectly close this point this part is turned back on the bag andpasted down. The machine, which forms this bag from a continuous stripof paper, is shown in the drawings and described in the followingspecification.

In the drawings, Figure 1 is a perspective of the machine. Fig. 2 is alongitudinal vertical section. Fig. 3 is-a plan view. Fig. 4 is anenlarged detail plan view of the folder. Fig. 5 is a side elevation,partly in section, of

the part shown in Fig. 4. Fig. 6 is a detailof the paper-feedingmechanism. Fig. 7 is a cross-section showing in detail the knife. Fig. 8is a bottom view of the knife. Fig. 9 is a detail of one of theknife-supports. Figs. 10 and ll are details of the point-turning device.Fig. 12 is a detail of the edgefolder. Fig. 13 is a plan view showingthe position of the reciprocating plate before it begins Serial No.726,286. (No model.)

to operate on the paper. Fig. 14 is a plan view showing the position ofthe reciprocating plate with the paper between the foldingplates andpartially folded. Fig. 15 is a plan view showing the position of theplates after the reciprocating plate has traveled entirely past thefixed plate, and it indicates the po sition of the paper on thereciprocating plate. Fig. 16 is a vertical longitudinal section showingthe point of the bag on the reciprocating plate as the plate, with thebag thereon, approaches the point-turner. Fig. 17 is a verticallongitudinal section showing the same parts as Fig. 16 after thereciprocating plate has contacted the point-turner and forced itpartially over. Fig. 18 is a vertical longitudinal section showing thesame parts with the reciprocating plate still farther over thepointfolder. Fig. 19 is a plan view of an end of the machine, and itshows the paper and the paste-feeding mechanism. Fig. 20 is a plan viewshowing the reciprocating and stationary folding-plates and the meansfor actuating the knife-lever and the jaw-lever. Fig. 21 is a verticallongitudinal elevation of the levers and rollers which actuate thelevers shown in Fig. 20. Fig. 22 is a cross-section of the paper,showing it as it engages under the creasing-wheel.

The machine consists of a frame, at one end of which there is mounted aroll of paper, and the paper is drawn from the roll by a reciprocatingmechanism that seizes the end of the paper and draws it forward untilenough paper has been drawn from the roll to make one bag. The front endof the paper is then seized under a bar, and the feeding mechanism movesback toward the roll of paper, again grasps the paper, and pulls a freshportion from the roll. The first portion is at the same time pushedforward under the holding? bar, which is loosened to enable the paper togo forward, and is cut off, seized in the foldingmachine and folded,pushed over the pointfolding mechanism, and the point folded back on thebody of the bag, and the reciprocating die-plate withdraws from theinterior of the bag, and the bag drops to the door or into a receptaclebelow the machine.

In the drawings, A indicates the main frame of the machine, at one endof which is a support B for the roll of paper. The roll of paper restson a friction-roll a, that is mounted on the support B, and the journalof the shaft on which the paper is wound rests in a fork b of thesupport B. The strip of paper 0 is led under a guide-roll a and along askeletontopped table that constitutes this part of the machine-frame.The skelet0ntopped table consists of a number of parallel slats (1, overwhich reciprocates a cross plate or bar (1,

that is held to guide-bars d and is actuated by a linked pitman d from acrank-shaft (1 The crank-shaft d is supported in bearings at the end ofthe frame. Opposite the roll of paper and upon the crank-shaft d ismounted the main driving-wheel 61 that receives motion from anyconvenient source of power. The shaft 07/ is geared to the shaft of thefriction-roll aby sprocket-chain gearing. M0- tion is imparted to theroll of paper by the friction-roll a, which is in continuous motion whenthe machine is in operation. The pitman (1 actuates both the plunger andreciprocating die-plate, over which the bag is folded, and thepaper-feeding mechanism. In order that it may actuate the paper-feedingmechanism, the plunger-head d is connected to an arm 6, that hangs froma rock-shaft e, so as to allow some lost motion between saidplunger-head and rock-shaft, as shown in Fig. 6. The rock -shaft e isjournaled in hangers 6 that are mounted on and travel on guide-rods CF.The rockshaft 6 lies across the table underneath the slats d. Fingers erise from the rock-shaft 6 between the slats d and are arranged toengage closely against the cross-plate cl when the pitman d is travelingtoward the crank end of the machine. When the pitman is traveling awayfrom the crank end of the machine, the fingers e drop from engagementwith the plate 01. The paper passes over the slats d, over the ends ofthe fingers e and under the plate 01. At the forward end of the skeletontable is a shearing-bar or paper-supporting bar d ,and above this bar islocated a vertically-reciprocating knife f, supported in vertical sidebearingsf, that rise from the frame A.

The knife f is preferably a serrated knife rather than one which shearsclosely against the bar (1. A spring presser-barf hangs;

at the rear of the knife and engages over the paperwith spring-pressure,holding the paper while the knife cuts it and also holding the forwardend of the paper to the bar (1 when the feed mechanism retreats. Theknife and the holding-barf are actuated by a mechanism shown in Figs. 2and 8. The

frame which carries the knife-barf is pro vided with a cross-bar f withwhich engages a lever f that is hung on apivoted rod f .and the pivotedrod f 5 extends across between the side pieces of the frame A. Theknifeframe is pulled downward bya spring f and is lifted by the lever f.The lever f is actuated by the pitman 01 through the instrumentality ofa friction-roll d, that is carried on a horizontal journal d borne on aplunger-head (i that travels between parallel rods d". The friction-rolld is normally held by a spring in a location to engage with the free endof the lever f. The roll at is a grooved roll, and the free end of thelever f is bent and has a vertically-widened portion f. The roll dtravels entirely to the rear of the free end of the lever f and in itstravel engages over the free end of the leverf The plunger and the rolltravel toward the cuttingknife until the roll passes the widened pa rt fof the lever f When the roll d has traveled inward beyond the end of thewidened party", the roll is held by the spring g opposite the inner endof the widened part f of the lever f and the roll travels back towardthe crank end of the machine,engaging over the lever. The spring on theshaft 01 allows the roll to yield and pass the free end of the lever,and as soon as the roll has passed the free end of the lever the springbrings the roll to position to engage again over the le ver with thelever in the groove of the roll 01. The widened portion f of the leverslopes upward for a distance and then is so shaped that after the leverf has been swung to lift the knife-bar the roll continues to bearagainst the lever and hold the knife-bar free from the bar c1 during themotion of the pitman toward the crank. Immediately after the roll dtravels off from the widened portion f of the lever f the spring f drawsthe presser-barf into engagement with the paper lying over the bar (1.

The paper-folding mechanism will be best understood from an examinationof Figs. 2, 3, and 13 to 18, inclusive. In front of the bar 61 is afixed triangular plate 3, one side of which is fixed to the side of theframe and a second side of which is fixed across the frame immediatelyin front of the bar (Z and somewhat below its upper edge. In front ofthis triangular plate is a reciprocating plate mounted on the head (i ofthe pitman (i The triangular plate 4 reciprocates from a location infront of the plate 3 to a location underneath the plate-3. The uppersurface of the triangular plate 4 is below the lower surface of theplate 3 by about the thickness of a piece of paper, and both plates arethin, so that the lower surface of the plate 4 is only slightly belowthe upper surface of the plate 3. (In Fig. 2 the distance is exaggeratedin proportion to the other parts of the machine.) Under the plate 4 andhinged to it is a jaw 4:, that is actuated by a mechanism, hereinafterto be described, and that closes against the paper during the backwardmovement of the head (i and plate 4:. In shape the folding plates whichare employed for folding pur poses are right-angled triangles, with thehypotenuse of each angle lying diagonally across the machine and twohypotenuses parallel with each other. The two parts may vary somewhatfrom the form shown, and the shape of the bag will vary accordingly; but

the form shown producesa right-angled bag, of which the overfolded edgeis at right angles to the open end and the edge of the underfolded sideof the paper is parallel to the edge of the overfold. The paper iscreased for the overfolded edge by a creasing-roller 5, that lies justin front of the roller a and is held in engagement with the paper by aspring 5. In front of the creasing-roller is a nozzle of a paste-tank 6,from which a stream of paste is spread over that portion of the paperwhich is to be folded over. The paper is held to the reciprocatingdie-plate by a jaw 4 The jaw 4 is one end of a lever that swings on apin 4" and is provided at one end with a grooved friction-roller 4, thatengages over a track 4 during the period of the inward motion of thepitman. Near the end of the inward motion the grooved roller 4 runs offthe track 4 and is carried to one side of the track by the spring 4 ()nthe returning or outward movement of the pitman the grooved roller doesnot engage on the top of the track 4 and the jaw remains open until thegrooved roller passes beyond the outer end of the track 4?. On itsinward stroke the roller again engages on the track 4 and closes thejaw. The jaw 4 holds the paper up against the under side of the plate 4against any possible liability to escape therefrom. The jaw 4 is notabsolutely essential to the working of the machine, because the machinewill fold the paper in the proper shape without the jaw and withoutfailures to any great extent;

but occasionally a piece of paper will slip from its proper place whenthe jaw is not used.

8 indicates the point-folder. This pointfoider is a curved platepresenting the convexity of its curvature toward the point of thereciprocating die-plate 4. It is hung on an arbor 8, which lies at theforward side of and below the arch of the plate.

8 is a spring tending to turn the curved plate 8 in the direction of thehands of a watch, as shown in the drawings.

The action of the point-turner is as follows: When the point of. thereciprocating die-plate 4, carrying the folded paper, approaches thepoint-turner 8, the point of the bag which projects slightly beyond thetruncated point of the plate 4 engages first against the curved plate 8,and because of the resistance of the plate 7 the point of the bag isforced downward somewhat and bends immediately in front of the truncatedend of the plate 4. The further progress of the plate brings the end ofthe plate 4, still covered with the bag, against the curved plate 8above its center of rotation. The plate 8 yields before the plate 4, butpresses strongly against the under side ofit thus carrying the point ofthe bag around and pressing it up against the body of the bag. The pointof the bag consists in part of the projecting triangular-shaped piece ofthe overfolded edge, and this triangular projectpaste, so that itadheres to the body of the bag and holds the folded point against thebody of the bag.

In addition to the creasing mechanism already described the overfoldingis aided by a warped sheet of metal somewhat similar to the hem mer of asewing-machine, which engages against the edge of the paper and forcesit upward from beneath thelower side of the die-plate 4 to a positionabove and along the paper folded over the upper side of the plate 4.

The operation'of the machine is as follows: Supposing the front end ofthe paper coming from the roll IO have been engaged between the fingersc and the plate (1'. With the first outward movement of the pitman theend of the paper is brought to and forced between the plate (Z and theholding-bar f and is caught and held in that position. The inwardmovement of the pitman carries the papergrip back for a new supply ofpaper and the paper-grip engages the paper when the pitman begins tomove outward again. At this time the plate f releases its hold on thepaper and the front end of the paper is projected under the knife untilenough projectsbeyond the knife to make one bag. The extreme front endof the paper has engaged under the plate 4. The pitman again makes aninstroke, carrying the severed portion of paper with it; but the rearend of the severed portion lies over the plate 3 and the pasted sideedge of the severed portion extends beyond the side of the plate 4 andis held up by engagement with the side of the machine to a position toengage with the turning-plate 9. As the pitman continues to travelinward, carrying with it the die-plate 4 and that part of the machinewhich is immediately connected with it, the paper is forced over the topof the die-plate and the pasted part of the paper is forced in from theside and pressed down upon the edge of the part that has been turnedforward. The pitman travels in until the point of the bag is turned bythe point-turner S, and then the pitman begins its putstroke. The sameaction of the paper-feeding mechanism is repeated with the outstroke ofthe pitman. The completed bag is held by the action of the plate 8 anddrops out of the way as soon as the plate 4 is with drawn from withinit.

What I claim is- 1. In a paper-folding machine, in combination with aframe, and means for feeding paper intermittently, a fixed triangularplate over which the paper is fed, a triangular reciprocating die-platearranged on a plane lower than the fixed plate, and means forreciprocating the die-plate under the fixed plate, substantially asdescribed.

2. In a paper-folding machine, in combination with a fixed plate, areciprocating dieplate, located on a plane beneath the fixed plate, apaper-turning guide located at one ing piece of the folded edge iscoated with A side of, and extending over, the reciprocating IIO plateand arranged to turn the edge of the paper over the die-plate,substantially as described. v

3. In a paper-folding mechanism, a severing-knife, a lever arranged tooperate said severing-knife, a reciprocating mechanism, a groovedfriction-roll carried by said reciprocating mechanism, the end of thelever being arranged diagonally across the path of the travelingfriction-roll, and the friction-roll being arranged to movelongitudinally of its axis, substantially as described.

4. In a paper-folding mechanism, in combination with a reciprocatingformer around which the bag is formed, a point-turner consisting of acurved engaging piece, pivoted beneath the line of travel of theformingpiece, and having a curved part which nor- In testimony whereof Isign this specifica- 30 tion. in the presence of two witnesses.

GEORGE P. DAVIS.

Witnesses:

O. 0. JENNINGS, J OHN N. GOODRICH.

